<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">nice Paul!<div><br></div><div><br><div>
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-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="color: rgb(0, 0, 0); "><div style="color: rgb(0, 0, 0); "><div style="color: rgb(0, 0, 0); ">Javier de la Torre</div><div style="color: rgb(0, 0, 0); "><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; 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">+1 347 320 7715</span></div><div style="font-size: medium; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="font-size: 10px; "><br></span></div><font class="Apple-style-span" size="2"><a href="http://www.cartodb.com/">www.cartodb.com</a></font></div><div style="color: rgb(0, 0, 0); "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><font class="Apple-style-span" size="2">Map, analyze and build applications with your data</font></div><div><font class="Apple-style-span" size="2"><br></font></div></div></div></span></div></div></div></div></span></div></div></div></span></div></div></div></div></span></div></span></div></span></div></span></div></span></span></div></div></div></div></span></div></div></div></div></span></div></span></div></div></div></span></div></div></div></div></span></div></div></div></span></div></div></div></div></span></div></span></div></span></div></span></div></span></div></span></span><br class="Apple-interchange-newline">
</div>
<br><div><div>On Jan 16, 2013, at 8:41 PM, Stephen Mather wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div>Ah, proper compression. Even better. :)<br><br></div>Best,<br>Steve<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jan 16, 2013 at 6:34 PM, Paul Ramsey <span dir="ltr"><<a href="mailto:pramsey@opengeo.org" target="_blank">pramsey@opengeo.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Development work in this vein is ongoing<br>
<br>
<a href="https://github.com/pramsey/pointcloud" target="_blank">https://github.com/pramsey/pointcloud</a><br>
<div><div class="h5"><br>
On Wed, Jan 16, 2013 at 1:49 PM, Bruce Rindahl <<a href="mailto:bruce.rindahl@gmail.com">bruce.rindahl@gmail.com</a>> wrote:<br>
> I am currently building a large PostGIS database of lidar data and going<br>
> through several performance tweaks to make 1.5 billion records respond<br>
> better. One of the big ones was to convert the z data by multiplying by 100<br>
> and storing it as an integer instead of a double (I know - pretty obvious).<br>
> The resulting reduction in storage space is significant as is query<br>
> performance. The x and y values are stored as a point value in a geometry<br>
> type which i believe is stored like two double precision values. Would it<br>
> be possible to specify a special geometry type using integer values instead<br>
> of doubles? You could either add a factor (and a special SRID) or just<br>
> round the values (possible in my case - are the lidar points really accurate<br>
> to less than a foot?). D3.js is doing something very similar to this in its<br>
> topoJSON format.<br>
> How much brain damage would this cause? Just thinking out loud...<br>
> Bruce<br>
><br>
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